EP0160992B1 - Plattenspeicher mit einer auswechselbaren magnetischen Plattenkassette und Kassette für einen derartigen Speicher - Google Patents

Plattenspeicher mit einer auswechselbaren magnetischen Plattenkassette und Kassette für einen derartigen Speicher Download PDF

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Publication number
EP0160992B1
EP0160992B1 EP85105677A EP85105677A EP0160992B1 EP 0160992 B1 EP0160992 B1 EP 0160992B1 EP 85105677 A EP85105677 A EP 85105677A EP 85105677 A EP85105677 A EP 85105677A EP 0160992 B1 EP0160992 B1 EP 0160992B1
Authority
EP
European Patent Office
Prior art keywords
cartridge
disc
groove
housing
memory
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85105677A
Other languages
English (en)
French (fr)
Other versions
EP0160992A2 (de
EP0160992A3 (en
Inventor
Albert Langrenne
Jacques Droux
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bull SAS
Original Assignee
Bull SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bull SAS filed Critical Bull SAS
Publication of EP0160992A2 publication Critical patent/EP0160992A2/de
Publication of EP0160992A3 publication Critical patent/EP0160992A3/fr
Application granted granted Critical
Publication of EP0160992B1 publication Critical patent/EP0160992B1/de
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/02—Details
    • G11B17/022—Positioning or locking of single discs
    • G11B17/028—Positioning or locking of single discs of discs rotating during transducing operation
    • G11B17/03—Positioning or locking of single discs of discs rotating during transducing operation in containers or trays
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/0014—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture record carriers not specifically of filamentary or web form
    • G11B23/0021—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture record carriers not specifically of filamentary or web form discs
    • G11B23/0028—Details
    • G11B23/0035—Details means incorporated in the disc, e.g. hub, to enable its guiding, loading or driving
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
    • G11B23/03—Containers for flat record carriers
    • G11B23/0301—Details
    • G11B23/0313—Container cases
    • G11B23/0316—Constructional details, e.g. shape
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
    • G11B23/03—Containers for flat record carriers
    • G11B23/032—Containers for flat record carriers for rigid discs
    • G11B23/0321—Containers for flat record carriers for rigid discs rigid cartridges for single discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
    • G11B23/03—Containers for flat record carriers
    • G11B23/032—Containers for flat record carriers for rigid discs
    • G11B23/0323—Containers for flat record carriers for rigid discs for disc-packs

Definitions

  • the present invention relates to a disk memory including a cartridge for removable magnetic disk (s) and the cartridge included in this memory.
  • Magnetic disk memories are more and more frequently used because of their storage capacity and the relatively short time taken by magnetic write / read heads to access information contained in any point of the discs from from the moment they were ordered to access this information.
  • magnetic discs carry information on circular concentric recording tracks whose width does not exceed a few tens of microns, and which are arranged on their two faces.
  • the magnetic heads are placed on each side of the discs at a distance of a few tenths of a micron from them.
  • the magnetic disks are driven by an electric motor at a constant speed.
  • these memories having a relatively low storage capacity (of the order of ten to a few tens of millions bytes, the byte being composed of eight bits, one bit being the unit of binary information equal to one or zero, and any materialization of this figure, for example in the form of magnetic recording), at least the one of these discs is contained in a removable cartridge.
  • a disk memory generally contains only one removable cartridge which is replaced by another as soon as the read and / or write operations concerning the disk which it contains are completed. It can thus be seen that a single memory with magnetic disks can be associated with a plurality of removable cartridges each containing a magnetic disk.
  • the memory comprises two magnetic disks, one of these is non-removable and remains permanently inside the disk memory, (the other being contained in the removable cartridge).
  • Removable magnetic disc cartridges are known, the standardized shape and dimensions of which ensure interchangeability, and the handling of which, when placed in the disc memory, is extremely simple. They also allow the disc not to be contaminated by any dust and particles during periods of rest, that is to say the periods lying between two periods of operation in the magnetic disk memory. In operation, they also allow ventilation of the disc allowing it to be kept perfectly clean, which increases the reliability of reading the information contained therein.
  • Such a cartridge comprises a removable rigid magnetic disc of small diameter. It is relatively flat (its height is more than 10 times less than its length or its width) and can be inserted in an adequate housing of a disc memory. It is provided with openings which are closed during the periods of rest of the cartridge and open when the cartridge is inserted in the disk memory, so as to allow the passage of the magnetic write / read heads and the movement of these. ci in relation to the different recording tracks.
  • This cartridge comprises means making it possible to couple the hub of the disc to rotational drive means (which most often consist of an electric motor).
  • This cartridge is characterized in that its opposite walls are rigid but elastically deformable and curved outward in the free state.
  • the disc memory includes a cartridge receptacle that can pivot around a horizontal hinge.
  • This receptacle has a width of very little greater than that of the cartridge and its side walls are formed by two angles inside which can slide this cartridge.
  • the receptacle can occupy two different stable positions. In the first position, called the working position, it is horizontal. The cartridge is then in place in the magnetic disk memory and the disk hub is coupled to the means for rotating the disk memory.
  • the receptacle occupies an inclined position relative to the horizontal. We can then either remove the cartridge from the receptacle, or insert it into it.
  • the movement of the receptacle is controlled by a front front door of the disk storage rack. This door can pivot around a horizontal hinge.
  • the receptacle When the front door is closed, the receptacle is in the horizontal position and the cartridge is in place inside the disc memory in the working position.
  • the front front door When the front front door is opened, the latter pivots around its hinge, thereby causing the receptacle to pivot around its own hinge, which brings the latter into its rest position. You can then remove the cartridge (or insert it).
  • a second device is also known for inserting and installing a cartridge inside a disk memory rack.
  • the cartridge contains a removable magnetic disk. It is intended to be inserted in a housing of a magnetic disk memory and consists of an envelope inside which the disk is placed, this envelope comprising a lower wall and an upper wall. It also comprises an opening allowing the passage of read / write heads of the information contained on the disc and a device making it possible to close these openings when the cartridge is at rest.
  • the cartridge comprises a disc hub which comprises means for coupling the latter to rotational drive means belonging to the magnetic disc memory.
  • the cartridge described in the document IBM comprises on its lower wall grooves which cooperate with positioning means included in the housing of the magnetic disk memory.
  • the coupling means of the latter device comprise on the one hand a friction plate secured to the hub of the disc and a positioning ball placed outside the lower part of the envelope center thereof.
  • This positioning ball ensures precise alignment of the friction plate of the cartridge with a second friction plate belonging to the rotation drive means.
  • This second friction plate has in its center a conical hole inside which is placed the positioning ball.
  • the present invention overcomes these drawbacks.
  • the main feature is to provide the lower wall of the cartridge on the one hand, and the coupling means of the disc hub on the other hand, a groove.
  • the groove of the bottom wall and the groove of the coupling means are in the extension of one another, when the cartridge is at rest outside of the disk memory.
  • the frame of the disk memory, and the rotary drive means are also respectively provided with positioning means coming to be placed respectively inside the groove of the lower wall, and of the groove of the coupling means. when the cartridge is inserted in the disc memory.
  • a very simple cartridge insertion and insertion device is thus produced, making it possible to insert the cartridge into the disk memory in a single operation, the insertion of the cartridge simultaneously ensuring the installation of the latter. inside the disk memory and the coupling of the disk hub with the rotary drive means.
  • the cartridge for at least one removable magnetic disk intended to be inserted into a housing of a magnetic disk memory consists of an envelope inside which the disk is placed and comprising a bottom wall and an upper wall, provided with an opening allowing the passage of read / write heads of the information contained on the disc, a device making it possible to close these openings when the cartridge is at rest, a hub of the disc comprising coupling means from the latter to rotary drive means, grooves cooperating with means for positioning the housing, is characterized in that the coupling means comprise a first groove, the lower wall of the casing comprising a second groove and spring means, the spring means being in contact with the coupling means and the two grooves being in the extension of one another during the insertion of the cartridge in the housing, the means for positioning the housing coming to be placed inside the second groove and the second means for positioning the drive means coming to engage in the first groove during this same insertion, at least one of the housing positioning means pressing the spring means against the lower wall of the casing so that they release the hub of the disc thus
  • the invention also relates to a magnetic disk memory comprising a housing intended to receive the cartridge described above, the first means of positioning the housing comprising two pins arranged inside the second groove during the insertion of the cartridge. and the second means for positioning the rotation drive means comprising a drive pin disposed inside the first groove during the insertion of the cartridge.
  • FIGS. 1, 2, 3 In order to better understand how the disk memory according to the invention is constituted and functions as well as the cartridge included in this memory, it is useful to make a few reminders illustrated by FIGS. 1, 2, 3 on the constitution and the functioning of the memories. with discs and cartridges for removable magnetic disc (s) according to the prior art.
  • Such a cartridge, as well as the manner in which it is inserted into the frame of the disk memory is, for example described on the one hand in the aforementioned patent No. 2,337,396 and on the other hand in the memory maintenance manuals with disc type D-120 and D-140 manufactured by the Company Cii Honeywell Bull.
  • FIG. 1 shows the cartridge according to the prior art CA which is in the form of a flat box with a square outline in which the magnetic disc DISC is enclosed.
  • One of the side faces of the cartridge comprises a window FEN which is closed by a VOL flap when the cartridge is at rest, that is to say when it is not inserted in the disk memory to which it is associated.
  • the VOL shutter is operated by an inviolable internal mechanism, not visible in FIG. 1, so that the FEN window is no longer closed.
  • the magnetic write / read E / L heads symbolized by an arrow in Figure 1 can be inserted inside the cartridge to read the data contained on both sides of the disc. magnetic DISC.
  • the cartridge CA is produced by an assembly of several pieces of rigid and elastically deformable material and the large opposite walls of the cartridge have been designated by the references PSUP and PINF, which can be called, by abuse of language, upper wall and lower wall of the cartridge.
  • FIG. 3 shows that the upper wall PSUP has in its center an internal projection SAL terminated by an annular bearing PORT, arranged opposite the internal face of the wall. Arranged coaxially with this projection, the opposite wall PINF has an opening bordered on its external face with an annular bearing PORT 2 .
  • the DISC disk is mounted on an annular hub MOY, the axial and opposite ends of which carry an internal collar COL, in contact with the PORT surface, and an external collar COL 2, in contact with the port 2 , respectively, when the cartridge is at rest.
  • FIG. 3 where the position of the collars COL, and COL 2 is shown in broken lines when the cartridge is at rest.
  • the frame BA of the disk memory includes a RECEPT receptacle which can receive the cartridge CA.
  • This receptacle is of substantially rectangular shape and has two angles on its sides inside which the cartridge can slide when it is inserted into the receptacle.
  • This receptacle is mounted on the frame BA by means of two hinges CHAR, and CHAR 2 which are substantially horizontal, the hinge CHAR, situated towards the rear of the disk memory, while the hinge CHAR2 is situated at the front of that -this.
  • the BA frame also includes a PFA front front door mounted on the same CHAR 2 hinge as the RECEPT receptacle.
  • the receptacle can occupy two stable positions, namely a horizontal position corresponding to the working position of the cartridge CA inside the disk memory (i.e. the position in which the hub of the disk DISC is coupled to means MER for driving the disk memory in rotation (see also FIG. 3)), and an inclined position with respect to the horizontal known as the rest position in which the CA cartridge can be inserted into or removed from the RECEPT receptacle.
  • the front front door PFA can occupy two positions, a vertical position when the cartridge CA is in the working position and the receptacle in the horizontal position, and on the other hand a horizontal position when the cartridge is in the rest position and the receptacle in inclined position.
  • the front front door PFA When the cartridge CA is completely inserted in the receptacle, the front front door PFA can then be tilted backwards in the direction of the arrow F AR (FIG. 2b) so as to move this door from its horizontal position to its position.
  • vertical which causes the RECEPT receptacle to tilt from its inclined position to its horizontal position.
  • the latter then exerts a vertical force F, on the upper wall PSUP of the cartridge and the frame BA of the disk memory exerts a vertical force F 2 on the lower wall PINF of the cartridge, in the opposite direction to F I.
  • the hub MED of the disc DISC is centered on a cone CO forming part of the drive means MER in rotation of the disc and is held on the latter by means of an annular magnetic ring MR secured to these means MER (see FIG. 3).
  • inserting and installing the cartridge requires two successive operations: first placing the cartridge inside the receptacle, then closing the front door before so as to lower the receptacle to its horizontal position and couple the drive hub MOY of the disc DISC to the drive means in rotation MER.
  • the present invention makes it possible to remedy these drawbacks by carrying out the insertion, the positioning and the coupling of the disc hub to the rotation drive means during a single and same operation.
  • the CART cartridge according to the invention which is shown in Figures 4 to 8 overcomes these drawbacks. It includes a DISC disc with a medium hub.
  • the CART cartridge carries a window F through which the magnetic writing / reading heads such as TEL and TEL 2 (see also Figure 6) can be introduced, when the cartridge is inserted in the disk memory with which it is associated.
  • the CART cartridge has a circular window curtain RF that can slide inside a GLIS slide.
  • This window curtain is integral with an SPG return spring, mounted on the drive axle of a CREM rack wheel ( Figures 4 and 6).
  • the CART cartridge comprises two half-envelopes ENVI and ENV 2 , the meeting of which forms the envelope ENV.
  • This envelope is preferably made of a relatively rigid plastic material.
  • the MOY hub of the CART cartridge includes ROUL and ROUL 2 bearings contained, for example, in the only ENV 2 half-envelope.
  • the CART cartridge also includes a JOFF ferrofluidic seal disposed between the hub MOY and the inner wall of the envelope ENV 2 , a ring BAG being placed between the seal and this wall as can be seen in Figures 5, 6 and 7
  • This ferrofluidic seal is to prevent dust from the bearings (for example from their lubrication products) from polluting the atmosphere in which the DISC disc is located.
  • An ENTO spacer is placed between the two ROUL and ROUL 2 bearings.
  • the medium hub of the disc includes a PLE disc drive plate provided with a RAIN groove (see also FIG. 8), the envelope ENV 2 also being provided with a RAIN 2 groove which is located in the extension of the groove.
  • RAIN it has the same width and same depth
  • the PLE tray is intended to be coupled to a PLENM drive plate for rotating the disk belonging to the MEMO disk memory.
  • the CART cartridge also includes an SPM spring fixed to the ENV 2 envelope by means of the VESPM screw-nut assembly.
  • the SPM spring When the cartridge is at rest, the SPM spring is pressed against the PLE plate and exerts a pressure force on the latter, thus preventing any movement of the DISC disc.
  • the pin TET 2 presses the spring SPM against the wall of the envelope ENV 2 so that the latter comes to release the drive plate PLENM thus making possible the rotation of that -this.
  • the drive plate PLENM of the drive motor of the disc DISC includes a drive pin TETEN which engages in the RAIN groove of the PLE drive plate of the DISC disc.
  • This nipple is provided with a flexible plastic sleeve which can slide slightly, while being tightened in the groove of the PLE plate, in order to avoid mechanical games in the coupling between the two plates and thus reduce the risk of vibration when the disc DISC is rotating.
  • Another advantage of the cartridge according to the invention is the simplicity with which it can be inserted into the MEMO disk memory, the insertion and the positioning of the CART cartridge therein and the coupling of the PLE tray with the MOY rotary drive means being carried out in a single operation.

Landscapes

  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)
  • Moving Of Heads (AREA)
  • Rotational Drive Of Disk (AREA)

Claims (2)

1. Kassette für wenigstens eine entfernbare Magnetplatte, dazu bestimmt, in eine Aufnahme eines Speichers mit Magnetplatte eingeschoben . zu werden, und die eine Hülle (ENV) umfaßt, in welche die Platte (DISC) eingelegt wird und die eine untere und eine obere Wand umfaßt sowie eine Öffnung (F) aufweist, welche den Durchgang der Köpfe zum Schreiben/Lesen der auf der Platte enthaltenen Informationen ermöglicht, wobei eine Einrichtung (RF) das Verschließen dieser Öffnungen ermöglicht, wenn die Kassette sich in ihrem Ruhezustand befindet, wobei ferner eine Nabe (MOY) der Platte (DISC) Mittel zum Ankoppeln dieser (PLE) an Drehantriebsmittel (PLENM) enthält und wobei Rillen mit Mitteln zum Aufnahmepositionieren zusammenwirken, dadurch gekennzeichnet, daß die Mittel zum Ankoppeln eine erste Rille (RAIN) umfassen, wobei die untere Wand der Hülle « (ENV) eine zweite Rille (RAIN2) sowie Federmittel (SPM) umfaßt, wobei die Federmittel mit den Mitteln zum Ankoppeln (PLE) in Berührung stehen und wobei die beiden Rillen beim Einschieben der Kassette in die Aufnahme in gegenseitiger Verlängerung stehen, wobei die Mittel zum Aufnahmepositionieren (TET1, TET2) im Inneren der zweiten Rille (RAIN2) liegen, wobei zweite Mittel zum Positionieren der Drehantriebsmittel (TETEN) in die erste Rille (RAIN) während desselben Einschiebens eingreifen, und wobei wenigstens eines der Mittel zum Aufnahmepositionieren (TET2) die Federmittel (SPM) gegen die untere Wand der Hülle (ENV) anlegt, so daß diese die Plattennabe freigeben und so deren Drehung ermöglichen.
2. Magnetplattenspeicher mit einer Aufnahme, die dazu bestimmt ist, eine Kassette nach Anspruch 1 zu empfangen, wobei die ersten Mittel zum Aufnahmepositionieren zwei Zapfen (TET1, TET2) umfassen, die beim Einschieben der Kassette im Inneren der zweiten Rille angeordnet sind, und wobei die zweiten Mittel zum Positionieren der Drehantriebsmittel einen Antriebszapfen (TETEN) umfassen, der beim. Einschieben der Kassette im Inneren der ersten Rille angeordnet ist.
EP85105677A 1981-12-23 1982-03-31 Plattenspeicher mit einer auswechselbaren magnetischen Plattenkassette und Kassette für einen derartigen Speicher Expired EP0160992B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8124057 1981-12-23
FR818124057A FR2518793B1 (fr) 1981-12-23 1981-12-23 Cartouche pour disque(s) magnetique(s) amovible(s)

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP82400595.3 Division 1982-03-31

Publications (3)

Publication Number Publication Date
EP0160992A2 EP0160992A2 (de) 1985-11-13
EP0160992A3 EP0160992A3 (en) 1986-01-08
EP0160992B1 true EP0160992B1 (de) 1988-09-28

Family

ID=9265312

Family Applications (2)

Application Number Title Priority Date Filing Date
EP82400595A Withdrawn EP0082743A1 (de) 1981-12-23 1982-03-31 Kassette für abnehmbare Magnetische Platte(n)
EP85105677A Expired EP0160992B1 (de) 1981-12-23 1982-03-31 Plattenspeicher mit einer auswechselbaren magnetischen Plattenkassette und Kassette für einen derartigen Speicher

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP82400595A Withdrawn EP0082743A1 (de) 1981-12-23 1982-03-31 Kassette für abnehmbare Magnetische Platte(n)

Country Status (4)

Country Link
US (1) US4646192A (de)
EP (2) EP0082743A1 (de)
JP (1) JPS58128065A (de)
FR (1) FR2518793B1 (de)

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FR2518793B1 (fr) * 1981-12-23 1988-02-12 Cii Honeywell Bull Cartouche pour disque(s) magnetique(s) amovible(s)
NL8503236A (nl) * 1985-11-25 1987-06-16 Philips Nv Informatiemedium, omvattende een informatieschijf.
JPH0520759A (ja) * 1991-04-19 1993-01-29 Sony Corp デイスクドライブ装置
US5218503A (en) * 1991-10-18 1993-06-08 Syquest Technology, Inc. 31/2 inch removable cartridge for a disk drive
JP2898886B2 (ja) * 1994-09-20 1999-06-02 松下電器産業株式会社 ディスクカートリッジ
JPH1064224A (ja) * 1996-08-26 1998-03-06 Sony Corp リムーバブルディスクカートリッジ
USD408801S (en) 1997-03-14 1999-04-27 Iomega Corporation Computer storage disk cartridge
JP4103257B2 (ja) 1998-07-13 2008-06-18 ソニー株式会社 ディスクカートリッジ
US6764037B2 (en) * 2002-03-25 2004-07-20 International Business Machines Corporation Housing for information storage medium and method using same
JP2005158209A (ja) * 2003-11-28 2005-06-16 Sony Corp テープカートリッジ
JP2006073101A (ja) * 2004-09-02 2006-03-16 Fuji Photo Film Co Ltd 記録ディスクカートリッジ
JP2006079715A (ja) * 2004-09-09 2006-03-23 Fuji Photo Film Co Ltd 記録ディスクカートリッジ

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BE791303A (fr) * 1971-12-10 1973-03-01 Ibm Ensemble de memoire a cartouche de disques interchangeable
US3851840A (en) * 1972-05-18 1974-12-03 Westinghouse Electric Corp High speed cartridge
GB1450744A (en) * 1973-02-01 1976-09-29 Sony Corp Magnetic tape cassettes
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JPS608544B2 (ja) * 1975-12-29 1985-03-04 富士写真フイルム株式会社 磁気シート用カートリツジ
FR2337396A1 (fr) * 1975-12-31 1977-07-29 Honeywell Bull Soc Ind Conditionnement pour disque magnetique
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FR2439435A1 (fr) * 1978-10-19 1980-05-16 Cii Honeywell Bull Mode d'ecriture d'informations sur un support d'enregistrement magnetique
JPS567267A (en) * 1979-06-26 1981-01-24 Nec Corp Magnetic disc pack unit
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US4532564A (en) * 1981-09-16 1985-07-30 Dysan Corporation Removable disk cartridge
FR2518793B1 (fr) * 1981-12-23 1988-02-12 Cii Honeywell Bull Cartouche pour disque(s) magnetique(s) amovible(s)
US4503474A (en) * 1982-06-04 1985-03-05 Syquest Technology Disc drive cartridge arrangement
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US4550355A (en) * 1982-11-22 1985-10-29 Dysan Corporation Removable disk cartridge with improved hub locking mechanism

Also Published As

Publication number Publication date
EP0160992A2 (de) 1985-11-13
JPS58128065A (ja) 1983-07-30
EP0082743A1 (de) 1983-06-29
FR2518793A1 (fr) 1983-06-24
EP0160992A3 (en) 1986-01-08
US4646192A (en) 1987-02-24
FR2518793B1 (fr) 1988-02-12

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